JPH0371697A - Inspecting device for circuit board - Google Patents

Abstract

PURPOSE:To protect in advance a circuit board to be tested next against damage by a method wherein a cleaning means which cleans a support board by blowing compressed air is provided near the support board. CONSTITUTION:Compressed air is made to blow on the board placing face of a support board 8 where a circuit board is placed for cleaning at each test. Therefore, even if a chip component 5 or the like is left on the board placing face of the support plate, it is blown off before a following board 4 to be tested is placed on the board placing face of the support board 6 to clean the board placing face. By this setup, a circuit board 4 to be tested next can be prevented from being damaged by a chip component 5 or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circuit board testing device for electrically testing a circuit board using contact pins.

[Summary of the Invention] The present invention provides a circuit board inspection device having a support plate for mounting and holding a circuit board, and a plurality of contact pins for inspecting the circuit board, in which a circuit board is provided near the support plate, for example, to be inspected next. By installing a cleaning means that blows compressed air onto the support board to clean the support board before inspecting the circuit board, it is possible to clean the support board by blowing away chip parts, etc. that have fallen onto the support board during circuit board inspection. This allows for constant cleaning and prevents damage to the next circuit board that will be placed and held on the support plate for inspection.

[Prior Art] For example, a circuit board inspection device that electrically inspects a circuit board is known. To explain this in detail with reference to FIGS. 2 and 3, 1 in FIG. 2 is the main body of the circuit board inspection device, which includes a pin jig support portion 1a and a pin jig support portion 1a.
It is composed of a vertical portion 1b standing vertically from the vertical portion a, and a cylinder support portion 1c provided above the vertical portion 1b.

A bin board 2 is attached to the uppermost part of the bin jig support l of the main body 1 of the apparatus.

A plurality of contact pins 3 for electrically testing the circuit board 4 are provided on the bin board 2 so as to be movable up and down, and a support plate 6 through which each of the contact pins 3 passes is attached to each support member 6a. It is installed via.

Further, a support frame 8 is attached to the lower part of the cylinder support portion 1c of the apparatus main body 1 via each rod 7a of a pair of air cylinders 7.7. A support plate 9 for mounting and holding the circuit board 4 between it and the support plate 6 on the bin board 2 side is attached to the lower surface of the support frame 8.

Then, when the start button 1d provided on the bottle jig support portion 1a of the main body 1 is pressed, the pair of air cylinders 7.7 are lowered, and the circuit board 4 is placed between the upper and lower pair of support plates 6, 9. is placed and held so that a predetermined inspection can be started via each inspection bin 3. Furthermore, after the inspection, when the stop button 1e provided on the bin jig support part 1a is pressed, the rod 7a of the air cylinder 7 is raised, the support plate 9 is separated from the support plate 6 on the bin board 2 side, and the circuit board is removed. 4 has been completed, and the circuit board 4 can now be taken out from the device main body 1.

[Problems to be Solved by the Invention] However, in the conventional circuit board inspection apparatus described above, the circuit board 4 is placed and held between the pair of support plates 6 and 9, and during a predetermined inspection using the plurality of contact pins 3, circuit board 4
Chip components 5, etc. may fall onto the upper surface of the support plate 6 (hereinafter referred to as the board placement surface) on which the circuit board 4 is placed. When inspected by placing it on a surface, as shown in Figure 3,
There is a drawback that the chip component 5 is sandwiched between the substrate mounting surface of the support plate 6 and the circuit board 4, and the lower surface of the next circuit board 4 is easily damaged.

Therefore, the present invention provides a circuit board inspection device that can prevent damage to the circuit board by cleaning the support plate on which the circuit board is placed with compressed air every time the circuit board is inspected. .

[Means for Solving the Problems] In a circuit board inspection device having a support plate for mounting and holding a circuit board, and a plurality of contact pins for inspecting the circuit board, there is provided a circuit board inspection device near the support plate before inspecting the circuit board. A cleaning means is provided for cleaning the support plate by blowing compressed air thereon.

[Effects] After the inspection is completed, the support plate on which the circuit board is placed is cleaned with compressed air, so even if chip parts, etc. have fallen during the inspection, the next circuit board to be inspected can be placed on the support plate. The chip parts and the like can be blown off and cleaned before being placed on the board, and the circuit board will not be damaged.

[Example 1] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. still,
Components that are the same as those in the conventional configuration are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 1 designates the main body of the circuit board inspection apparatus, which is composed of a pin jig support part 1a, a vertical part 1b, and a cylinder support part 1c. The above-mentioned cylinder support part 1c is provided with a bin board 2 and a support plate 6 on which book contact pins 3 are protruded.
The structure is similar to the conventional structure in that a support plate 9 is provided via a pair of air cylinders 7, 7, etc.

Here, before inspecting the circuit board 4, compressed air A is blown onto the support plate 6 on the bin board 2 side on both sides of the vertical part 1b of the apparatus main body 1, so that the upper surface (hereinafter referred to as the board mounting surface) of the support plate 6 is sprayed. A cleaning means 10 is provided for cleaning.

This cleaning means 10 consists of columns 11. mounted on both sides of the vertical portion 1b of the main body 1 of the apparatus. A pair of air supply pipes 12.12 are each fixed at a predetermined position of II, and the proximal ends are connected to a compressed air source (none of which is shown) consisting of a compressor or the like via each electromagnetic valve, and this pair of air supply pipes 12. A pair of nozzles 13, 13 connected to the tips of the supply pipes 12 and 12 and injecting compressed air A from the compressed air source onto the substrate mounting surface of the port plate 6, and one of the support columns 11. When one end of the upper support plate portion 8a of the support frame 8 that protrudes from the side surface 11a of the support frame 8 and supports the support plate 9 on the cylinder support portion 1c side rises, it comes into contact with and separates from the upper support plate portion 8a, thereby opening and closing each of the electromagnetic valves. It is comprised of a pair of upper and lower limit switches 14.15 for injecting and stopping the compressed air A from each pair of nozzles 13.13. That is, after the circuit board 4 is inspected, the circuit board 4 is removed from the board mounting surface of the support plate 6.
is removed, and when the support plate 9 is moved up by a predetermined stroke by the pair of air cylinders 7.7, the upper support plate portion 8a touches the lower limit switch 15, opening each of the electromagnetic valves, and compressing from each pair of nozzles 13.13. Air A is blown onto the substrate mounting surface of the support plate 6, and when the support plate 9 further rises and touches the upper limit switch 14, each of the electromagnetic valves closes and each pair of nozzles 13 The injection of compressed air A from , 13 is stopped. The pair of upper and lower limit switches 14, 15 operate only when the support plate 9 is raised, and are not operated when the support plate 9 is lowered.

According to the circuit board inspection apparatus of the above embodiment, when carrying out a predetermined electrical inspection via the plurality of contact pins 3 with the circuit board 4 placed and held between the pair of support plates 6 and 9, the circuit As shown in FIG. 3, chip components 5, foreign objects, etc. may fall on the board mounting surface of the support plate 6 on which the board 4 is mounted, as shown in FIG. However, after the inspection of the circuit board 4 is completed, the support plate 9 is raised via a pair of air cylinders 7.7, the circuit board 4 is removed from the board mounting surface of the support plate 6, and the support plate 9 is further raised. When one end of the upper support plate portion 8a touches the lower limit switch 15, each of the electromagnetic valves opens and each pair of nozzles 13.
13, compressed air A blows off the chip parts 5, foreign matter, etc. on the substrate mounting surface of the support plate 6. Thereafter, when the support plate 9 further rises and touches the upper limit switch 14, each of the electromagnetic valves is closed and the injection of the compressed air A is stopped, completing the preparation for setting the circuit board 4 to be inspected next.

In this way, compressed air A is sprayed on the board mounting surface of the support plate 6 on which the circuit board 4 is mounted for a certain period of time to clean it after each inspection. Even if it falls onto the board mounting surface of the support plate 6, it can be blown away and cleaned before the next circuit board 4 to be inspected is placed on the board mounting surface of the support board 6, and the next circuit board can be cleaned during inspection. Damage caused by the chip components 5, etc. of No. 4 can be prevented.

In addition, according to the above embodiment, each solenoid valve that turns on and off the supply of compressed air is opened and closed using a pair of glue mitts, but the circuit is not limited to this. An optical sensor is provided to detect the position of the board, and the circuit board is placed on the support plate via a delay circuit that operates each electromagnetic valve when the circuit board is removed from the board mounting surface based on the sensor's board position detection signal. The surface may be controlled to be air-cleaned for a certain period of time.

[Effects of the Invention] As described above, according to the present invention, since the cleaning means for cleaning the support plate by blowing compressed air is provided near the support plate, chips that have fallen on the support plate after inspection of the circuit board are removed. Parts and the like can be blown away and cleaned with compressed air, and damage to the circuit board to be inspected next can be prevented.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a circuit board inspection device showing an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a conventional circuit board inspection device, and FIG. 3 is an enlarged explanatory diagram of the main parts. . 3... Contact pin, 4... Circuit board, 6.9.
...Support plate, 10...Cleaning means, A...Compressed air. February 2, 1990 Display of the incident 1999 Patent Application No. 207508 Lijisaikai Building, 1-29 Akashi-cho, Chuo-ku, Tokyo 104 Subject of amendment 6, Contents of amendment (1) “Start button 1” on page 3, line 12 of the specification
``When you press d,'' changes to ``Start buttons 1d and 1e.
"If you press both at the same time," corrected. (2) In the specification, on page 3, lines 16 to 18, it says ``Start.'' Also, after the inspection...
The phrase "the rod 7a of the air cylinder 7 is raised" is corrected to "the rod 7a of the air cylinder 7 is raised".

Claims (1)

[Claims] (1) In a circuit board inspection device having a support plate for mounting and holding a circuit board and a plurality of contact pins for inspecting the circuit board, compressed air is sprayed onto the support plate in the vicinity of the support plate to clean it. A circuit board inspection device characterized by being provided with a cleaning means.